http://www.lancasterbikeclub.org/cbm.php
Here's the info for the covered bridge ride. It's a beautiful route...and a really fun ride. Just prepare yourself for the crowd, last year there were close to 3,000 riders. The first organized ride I did (on a hybrid) was the PA Dutch and the first organized ride on my road bike was the Lancaster Covered Bridge, there's nothing like saying "on you left" to an Amish horse and buggy!
"The bicycle is just as good company as most husbands and, when it gets old and shabby, a woman can dispose of it and get a new one without shocking the entire community." -- Ann Strong, Minneapolis Tribune, 1895